/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package org.apache.skywalking.apm.plugin.lettuce.v5.interceptor;

import io.lettuce.core.protocol.CommandType;
import org.apache.skywalking.apm.agent.core.logging.api.ILog;
import org.apache.skywalking.apm.agent.core.logging.api.LogManager;
import org.apache.skywalking.apm.plugin.lettuce.v5.memory.MemoryStorage;
import org.apache.skywalking.apm.util.StringUtil;

import java.util.Arrays;
import java.util.List;

public class RedisHotKeyInterceptor extends AbsRedisBeforeInterceptor {

    private static ILog LOGGER = LogManager.getLogger(RedisHotKeyInterceptor.class);

    private static final List<String> COMMAND_TYPES = Arrays.asList(CommandType.GET.name(),
            CommandType.SET.name(),
            CommandType.INCR.name(),
            CommandType.DECR.name(),
            CommandType.DEL.name(),
            CommandType.EXISTS.name(),
            CommandType.EXPIRE.name()
    );

    @Override
    public boolean match(String type, String key) {
        LOGGER.info("match hotKey:{}", key);
        return StringUtil.isNotBlank(key) && match(COMMAND_TYPES, type);
    }

    @Override
    public void execute(String type, String key) {
        MemoryStorage.getInstance().addHotKey(key);
    }

    private boolean match(List<String> commandTypes, String type) {
        for (String ct : commandTypes) {
            if (type.indexOf(ct) > -1) {
                return true;
            }
        }
        return false;
    }
}
